American catcher and coach in Major League Baseball.
Served as a spy for the OSS, the precursor to the CIA, during World War II.
Despite playing 15 seasons in Major League Baseball, Berg was a relatively average player, and was better known as "the brainiest guy in baseball". Speaking several languages and known for his intellectual capacity, he continued to occasionally serve the CIA, the successor to the OSS, after WWII.
Moe Berg - Wikipedia
"Who Was Moe Berg? A Spy, a Big-League Catcher and an Enigma" - The New York Times (2018)